Domain Testing: Divide and Conquer - Testing Education

Test
case#
a(3) b(2) c(2) d(2) e(2)
1. A1 B1 C1 D1 E1
2. A1 B2 C2 D2 E2
3. A2 B1 C2 D2 E2
4. A2 B2 C1 D1 E1
5. A3 B1 C1 D2 E2
6. A3 B2 C2 D1 E1
Refer guideline numbered 12 in Appendix B: Guidelines for filling in “allpairs
combination” table
We observe that the sequence of test cases of variable ‘e’ in e’s column yields the
following results:
• each test case of variable ‘e’ is paired with each test case of variables a, b and
c.
• each test case of variable ‘e’ is NOT paired with each test case of variable d.
For instance, D1 is paired with only E1 and D2 is paired with only E2 in all
the three sets.
Step 6:
Backtracking:
• Erase the third set of variable ‘e’ since the choice of ordering was based on the
ordering of the previous set.
• Let us swap the ordering in set two for variable ‘e’, from E2 followed by E1 to E1
followed by E2 and see if this does any good.
Test
case#
a(3) b(2) c(2) d(2) e(2)
1. A1 B1 C1 D1 E1
2. A1 B2 C2 D2 E2
3. A2 B1 C2 D2 E1
4. A2 B2 C1 D1 E2
5. A3 B1 C1 D2
6. A3 B2 C2 D1
• Let us now have E2 followed by E1 for the third set of variable ‘e’.
© Sowmya Padmanabhan, 2003
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